diff --git a/test/built-ins/Temporal/Now/timeZone/new-object.js b/test/built-ins/Temporal/Now/timeZone/new-object.js
deleted file mode 100644
index 01ff926a608..00000000000
--- a/test/built-ins/Temporal/Now/timeZone/new-object.js
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright (C) 2020 Igalia, S.L. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-temporal.now.timezone
-description: Each invocation of the function produces a distinct object value
-features: [Temporal]
----*/
-
-const tz = Temporal.Now.timeZone;
-const tz1 = tz();
-const tz2 = tz();
-assert.notSameValue(tz1, tz2, 'The value of tz1 is expected to not equal the value of `tz2`');
diff --git a/test/built-ins/Temporal/Now/timeZone/return-value.js b/test/built-ins/Temporal/Now/timeZone/return-value.js
deleted file mode 100644
index 098717a1ced..00000000000
--- a/test/built-ins/Temporal/Now/timeZone/return-value.js
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright (C) 2021 the V8 project authors. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-esid: sec-temporal.now.timezone
-description: Temporal.Now.timeZone returns an instance of the TimeZone constructor
-info: |
-  1. Return ? SystemTimeZone().
-features: [Temporal]
----*/
-
-assert.sameValue(
-  Object.getPrototypeOf(Temporal.Now.timeZone()),
-  Temporal.TimeZone.prototype,
-  'Object.getPrototypeOf(Temporal.Now.timeZone()) returns Temporal.TimeZone.prototype'
-);
diff --git a/test/built-ins/Temporal/Now/timeZone/extensible.js b/test/built-ins/Temporal/Now/timeZoneId/extensible.js
similarity index 63%
rename from test/built-ins/Temporal/Now/timeZone/extensible.js
rename to test/built-ins/Temporal/Now/timeZoneId/extensible.js
index 929a0708476..05a87d588be 100644
--- a/test/built-ins/Temporal/Now/timeZone/extensible.js
+++ b/test/built-ins/Temporal/Now/timeZoneId/extensible.js
@@ -2,8 +2,8 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: sec-temporal.now.timezone
-description: Temporal.Now.timeZone is extensible.
+esid: sec-temporal.now.timezoneid
+description: Temporal.Now.timeZoneId is extensible.
 info: |
   ## 17 ECMAScript Standard Built-in Objects
 
@@ -13,6 +13,6 @@ features: [Temporal]
 ---*/
 
 assert(
-  Object.isExtensible(Temporal.Now.timeZone),
-  'Object.isExtensible(Temporal.Now.timeZone) must return true'
+  Object.isExtensible(Temporal.Now.timeZoneId),
+  'Object.isExtensible(Temporal.Now.timeZoneId) must return true'
 );
diff --git a/test/built-ins/Temporal/Now/timeZone/length.js b/test/built-ins/Temporal/Now/timeZoneId/length.js
similarity index 87%
rename from test/built-ins/Temporal/Now/timeZone/length.js
rename to test/built-ins/Temporal/Now/timeZoneId/length.js
index fdf33918f16..0a268a2e530 100644
--- a/test/built-ins/Temporal/Now/timeZone/length.js
+++ b/test/built-ins/Temporal/Now/timeZoneId/length.js
@@ -2,8 +2,8 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: sec-temporal.now.timezone
-description: Temporal.Now.timeZone.length is 0
+esid: sec-temporal.now.timezoneid
+description: Temporal.Now.timeZoneId.length is 0
 info: |
     Every built-in function object, including constructors, has a "length" property whose value is
     an integer. Unless otherwise specified, this value is equal to the largest number of named
@@ -17,7 +17,7 @@ includes: [propertyHelper.js]
 features: [Temporal]
 ---*/
 
-verifyProperty(Temporal.Now.timeZone, "length", {
+verifyProperty(Temporal.Now.timeZoneId, "length", {
   value: 0,
   writable: false,
   enumerable: false,
diff --git a/test/built-ins/Temporal/Now/timeZone/name.js b/test/built-ins/Temporal/Now/timeZoneId/name.js
similarity index 71%
rename from test/built-ins/Temporal/Now/timeZone/name.js
rename to test/built-ins/Temporal/Now/timeZoneId/name.js
index 2e70d8b02db..67c9858604a 100644
--- a/test/built-ins/Temporal/Now/timeZone/name.js
+++ b/test/built-ins/Temporal/Now/timeZoneId/name.js
@@ -2,8 +2,8 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: sec-temporal.now.timezone
-description: Temporal.Now.timeZone.name is "timeZone".
+esid: sec-temporal.now.timezoneid
+description: Temporal.Now.timeZoneId.name is "timeZoneId".
 info: |
   ## 17 ECMAScript Standard Built-in Objects:
   Every built-in Function object, including constructors, that is not
@@ -18,12 +18,12 @@ features: [Temporal]
 ---*/
 
 assert.sameValue(
-  Temporal.Now.timeZone.name,
-  'timeZone',
-  'The value of Temporal.Now.timeZone.name is expected to be "timeZone"'
+  Temporal.Now.timeZoneId.name,
+  'timeZoneId',
+  'The value of Temporal.Now.timeZoneId.name is expected to be "timeZoneId"'
 );
 
-verifyProperty(Temporal.Now.timeZone, 'name', {
+verifyProperty(Temporal.Now.timeZoneId, 'name', {
   enumerable: false,
   writable: false,
   configurable: true
diff --git a/test/built-ins/Temporal/Now/timeZone/not-a-constructor.js b/test/built-ins/Temporal/Now/timeZoneId/not-a-constructor.js
similarity index 60%
rename from test/built-ins/Temporal/Now/timeZone/not-a-constructor.js
rename to test/built-ins/Temporal/Now/timeZoneId/not-a-constructor.js
index 7239f3b43ee..4056fd39ec1 100644
--- a/test/built-ins/Temporal/Now/timeZone/not-a-constructor.js
+++ b/test/built-ins/Temporal/Now/timeZoneId/not-a-constructor.js
@@ -2,8 +2,8 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: sec-temporal.now.timezone
-description: Temporal.Now.timeZone does not implement [[Construct]]
+esid: sec-temporal.now.timezoneid
+description: Temporal.Now.timeZoneId does not implement [[Construct]]
 info: |
   ECMAScript Function Objects
 
@@ -14,8 +14,8 @@ includes: [isConstructor.js]
 features: [Reflect.construct, Temporal, arrow-function]
 ---*/
 
-assert.sameValue(isConstructor(Temporal.Now.timeZone), false, 'isConstructor(Temporal.Now.timeZone) must return false');
+assert.sameValue(isConstructor(Temporal.Now.timeZoneId), false, 'isConstructor(Temporal.Now.timeZoneId) must return false');
 
 assert.throws(TypeError, () => {
-  new Temporal.Now.timeZone();
-}, 'new Temporal.Now.timeZone() throws a TypeError exception');
+  new Temporal.Now.timeZoneId();
+}, 'new Temporal.Now.timeZoneId() throws a TypeError exception');
diff --git a/test/built-ins/Temporal/Now/timeZone/prop-desc.js b/test/built-ins/Temporal/Now/timeZoneId/prop-desc.js
similarity index 69%
rename from test/built-ins/Temporal/Now/timeZone/prop-desc.js
rename to test/built-ins/Temporal/Now/timeZoneId/prop-desc.js
index 15829fb2eb1..15cafacf0c5 100644
--- a/test/built-ins/Temporal/Now/timeZone/prop-desc.js
+++ b/test/built-ins/Temporal/Now/timeZoneId/prop-desc.js
@@ -2,8 +2,8 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: sec-temporal.now.timezone
-description: The "timeZone" property of Temporal.Now
+esid: sec-temporal.now.timezoneid
+description: The "timeZoneId" property of Temporal.Now
 info: |
   Section 17: Every other data property described in clauses 18 through 26
   and in Annex B.2 has the attributes { [[Writable]]: true,
@@ -12,9 +12,9 @@ includes: [propertyHelper.js]
 features: [Temporal]
 ---*/
 
-assert.sameValue(typeof Temporal.Now.timeZone, "function", "typeof is function");
+assert.sameValue(typeof Temporal.Now.timeZoneId, "function", "typeof is function");
 
-verifyProperty(Temporal.Now, 'timeZone', {
+verifyProperty(Temporal.Now, 'timeZoneId', {
   enumerable: false,
   writable: true,
   configurable: true
diff --git a/test/built-ins/Temporal/Now/timeZoneId/return-value.js b/test/built-ins/Temporal/Now/timeZoneId/return-value.js
new file mode 100644
index 00000000000..efb52a123de
--- /dev/null
+++ b/test/built-ins/Temporal/Now/timeZoneId/return-value.js
@@ -0,0 +1,16 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.now.timezoneid
+description: Temporal.Now.timeZoneId returns a string
+info: |
+  1. Return DefaultTimeZone().
+features: [Temporal]
+---*/
+
+assert.sameValue(
+  typeof Temporal.Now.timeZoneId(),
+  "string",
+  "Temporal.Now.timeZoneId() returns a string"
+);
diff --git a/test/built-ins/Temporal/Now/zonedDateTime/time-zone-undefined.js b/test/built-ins/Temporal/Now/zonedDateTime/time-zone-undefined.js
index 71bc5816a27..731c9c3ba1f 100644
--- a/test/built-ins/Temporal/Now/zonedDateTime/time-zone-undefined.js
+++ b/test/built-ins/Temporal/Now/zonedDateTime/time-zone-undefined.js
@@ -18,14 +18,14 @@ Object.defineProperty(Temporal.TimeZone, "from", {
   },
 });
 
-const systemTimeZone = Temporal.Now.timeZone();
+const systemTimeZone = Temporal.Now.timeZoneId();
 
 const resultExplicit = Temporal.Now.zonedDateTime('iso8601', undefined);
-assert.sameValue(resultExplicit.timeZone.id, systemTimeZone.id);
+assert.sameValue(resultExplicit.timeZone.id, systemTimeZone);
 
 assert.compareArray(actual, expected, "Temporal.TimeZone.from should not be called");
 
 const resultImplicit = Temporal.Now.zonedDateTime('iso8601');
-assert.sameValue(resultImplicit.timeZone.id, systemTimeZone.id);
+assert.sameValue(resultImplicit.timeZone.id, systemTimeZone);
 
 assert.compareArray(actual, expected, "Temporal.TimeZone.from should not be called");
diff --git a/test/built-ins/Temporal/Now/zonedDateTimeISO/return-value.js b/test/built-ins/Temporal/Now/zonedDateTimeISO/return-value.js
index fe5db1af9ac..26ce97d976f 100644
--- a/test/built-ins/Temporal/Now/zonedDateTimeISO/return-value.js
+++ b/test/built-ins/Temporal/Now/zonedDateTimeISO/return-value.js
@@ -8,9 +8,9 @@ features: [Temporal]
 ---*/
 
 const zdt = Temporal.Now.zonedDateTimeISO();
-const tz = Temporal.Now.timeZone();
+const tz = Temporal.Now.timeZoneId();
 assert(zdt instanceof Temporal.ZonedDateTime);
 assert(zdt.calendar instanceof Temporal.Calendar);
 assert.sameValue(zdt.calendar.id, "iso8601");
 assert(zdt.timeZone instanceof Temporal.TimeZone);
-assert.sameValue(zdt.timeZone.id, tz.id);
+assert.sameValue(zdt.timeZone.id, tz);
diff --git a/test/built-ins/Temporal/Now/zonedDateTimeISO/time-zone-undefined.js b/test/built-ins/Temporal/Now/zonedDateTimeISO/time-zone-undefined.js
index 7ed6e7b47cd..1c34551414d 100644
--- a/test/built-ins/Temporal/Now/zonedDateTimeISO/time-zone-undefined.js
+++ b/test/built-ins/Temporal/Now/zonedDateTimeISO/time-zone-undefined.js
@@ -18,14 +18,14 @@ Object.defineProperty(Temporal.TimeZone, "from", {
   },
 });
 
-const systemTimeZone = Temporal.Now.timeZone();
+const systemTimeZone = Temporal.Now.timeZoneId();
 
 const resultExplicit = Temporal.Now.zonedDateTimeISO(undefined);
-assert.sameValue(resultExplicit.timeZone.id, systemTimeZone.id);
+assert.sameValue(resultExplicit.timeZone.id, systemTimeZone);
 
 assert.compareArray(actual, expected, "Temporal.TimeZone.from should not be called");
 
 const resultImplicit = Temporal.Now.zonedDateTimeISO();
-assert.sameValue(resultImplicit.timeZone.id, systemTimeZone.id);
+assert.sameValue(resultImplicit.timeZone.id, systemTimeZone);
 
 assert.compareArray(actual, expected, "Temporal.TimeZone.from should not be called");
diff --git a/test/intl402/Temporal/Now/zonedDateTime/calendar-string.js b/test/intl402/Temporal/Now/zonedDateTime/calendar-string.js
index 2b75ab8dfc0..d729bddff8e 100644
--- a/test/intl402/Temporal/Now/zonedDateTime/calendar-string.js
+++ b/test/intl402/Temporal/Now/zonedDateTime/calendar-string.js
@@ -8,10 +8,10 @@ features: [Temporal]
 ---*/
 
 const zdt = Temporal.Now.zonedDateTime("gregory");
-const tz = Temporal.Now.timeZone();
+const tz = Temporal.Now.timeZoneId();
 assert(zdt instanceof Temporal.ZonedDateTime);
 assert(zdt.calendar instanceof Temporal.Calendar);
 assert.sameValue(zdt.calendar.id, "gregory");
 assert(zdt.timeZone instanceof Temporal.TimeZone);
-assert.sameValue(zdt.timeZone.id, tz.id);
+assert.sameValue(zdt.timeZone.id, tz);